It depends on the wheel size and the gearing.

If it has a "normal" bike wheel size with the same gearing, it can reach the same speeds.

Bikes with smaller wheels need bigger chainrings and/or smaller sprockets to reach high speeds. Another option is using an IGH.

I have reached 70km/h with a 20" Dahon with SRAM DualDrive, a 52t chainring and 11t sprocket. It has a higher gearing than most road bikes.